diff --git a/Network/TLS/Extra/Certificate.hs b/Network/TLS/Extra/Certificate.hs
--- a/Network/TLS/Extra/Certificate.hs
+++ b/Network/TLS/Extra/Certificate.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE OverloadedStrings, CPP #-}
 -- |
 -- Module      : Network.TLS.Extra.Certificate
 -- License     : BSD-style
@@ -23,6 +23,21 @@
 import qualified Crypto.Cipher.RSA as RSA
 import qualified Crypto.Cipher.DSA as DSA
 
+#if defined(NOCERTVERIFY)
+
+# warning "********certificate verify chain doesn't yet work on your platform *************"
+# warning "********please consider contributing to the certificate to fix this issue *************"
+# warning "********getting trusted system certificate is platform dependant *************"
+
+{- on windows and OSX, the trusted certificates are not yet accessible,
+ - for now, print a big fat warning (better than nothing) and returns true  -}
+certificateVerifyChain :: [X509] -> IO Bool
+certificateVerifyChain _ = do
+	putStrLn "****************** certificate verify chain doesn't yet work on your platform **********************"
+	putStrLn "please consider contributing to the certificate package to fix this issue"
+	return True
+
+#else
 -- | verify a certificates chain using the system certificates available.
 --
 -- each certificate of the list is verified against the next certificate, until
@@ -45,6 +60,7 @@
 			let x = certSubjectDN syscert
 			let y = certIssuerDN cert
 			x == y
+#endif
 
 -- | verify a certificate against another one.
 -- the first certificate need to be signed by the second one for this function to succeed.
diff --git a/tls-extra.cabal b/tls-extra.cabal
--- a/tls-extra.cabal
+++ b/tls-extra.cabal
@@ -1,5 +1,5 @@
 Name:                tls-extra
-Version:             0.1.3
+Version:             0.1.4
 Description:
    a set of extra definitions, default values and helpers for tls.
 License:             BSD3
@@ -42,6 +42,8 @@
                      Network.TLS.Extra.Compression
                      Network.TLS.Extra.Thread
   ghc-options:       -Wall -fno-warn-missing-signatures
+  if os(windows) || os(osx)
+    cpp-options:     -DNOCERTVERIFY
 
 Executable           stunnel
   Main-is:           Examples/Stunnel.hs